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Cerebral Venous Sinus Thrombosis May Follow a Seasonal Pattern

Golshan Salehi1, Payam Sarraf2, Farzad Fatehi3

  • 1Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran.

Journal of Stroke and Cerebrovascular Diseases : the Official Journal of National Stroke Association
|August 27, 2016
PubMed

Insights

Cerebral venous sinus thrombosis (CVST) incidence rises in warmer months, possibly due to dehydration. However, severe CVST with cerebral infarcts is more common in colder months, particularly in females.

Area of Science:

  • Neurology
  • Vascular Medicine
  • Environmental Health

Background:

  • Seasonal variations in arterial stroke are known, but data on cerebral venous sinus thrombosis (CVST) is limited.
  • This study addresses the lack of research on seasonal patterns and temperature associations in CVST incidence.

Purpose of the Study:

  • To investigate seasonal variations in the occurrence of cerebral venous sinus thrombosis (CVST).
  • To explore the association between CVST incidence and ambient temperature.

Main Methods:

  • A retrospective analysis of 166 patients diagnosed with definite CVST between January 2004 and July 2015.
  • Comparison of CVST incidence during high-temperature versus low-temperature months across two referral centers.

Main Results:

  • CVST occurred more frequently during warmer months (July-September) compared to colder months (December-April).
  • A significant positive correlation was found between mean monthly temperature and CVST frequency (r=0.60, P=0.03).
  • A subset of patients, predominantly female, experienced CVST with cerebral infarcts during cold months, often presenting with seizures and neurological deficits.

Conclusions:

  • CVST incidence appears to increase during warmer months, potentially linked to dehydration.
  • Visible cerebral infarcts associated with CVST were more frequently observed during colder months.
Abstract

Keywords:
AssociationIrancerebral venous sinus thrombosisincidenceseasonstroketemperature

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